Bunnell Miniature Combination Set & Bunnell secret Sounder

17A
Note that this combination set is shown actual size! Not only does this
work, it was availbable in a variety of resistances, including that for
main line use. Back in 1918, this miniature set cost about a dollar more
then Bunnell's best full-size set.

Needless to say, the miniature instruments are scarce and highly sought
by collectors. But they are out there.

17B
This could be the forerunner of headphones, but you won't hear voices or
the beeps of Continental code with it.

This item illustrates the importance of taking a close look at all the
"junk" under the tables at flea markets. Although many people do collect
(audio) headphones, something like this might have been passed over by
collectors focussed on a set by Cannon or Brandes. But to the telegraph
instrument collector who knows what it is, this Secret Sounder could be
the centerpiece of a shelf full of sounders.